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Modal logic

Known as: , Alethic logic, Contingent truth 
Modal logic is a type of formal logic primarily developed in the 1960s that extends classical propositional and predicate logic to include operators… 
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Papers overview

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Review
2013
Review
2013
The Planck nominal mission cosmic microwave background (CMB) maps yield unprecedented constraints on primordial non-Gaussianity… 
Highly Cited
2005
Highly Cited
2005
1. Introduction and Discussion 2. Modal and Superintuitionistic Logics: Basic Concepts 3. Superintuitionistic Logics and Normal… 
Highly Cited
2004
Highly Cited
2004
[1] Aerosol optical properties and the spectral behavior of the aerosol optical depth (AOD) over Kanpur, an urban-industrial city… 
Highly Cited
2003
Highly Cited
2003
We study nearly 7,000 retirement accounts during the April 1994-August 1998 period. Several interesting patterns emerge. Most… 
Highly Cited
2002
Highly Cited
2002
This book is in copyright. Subject to statutory exception and to the provisions of relevant collective licensing agreements, no… 
Highly Cited
1998
Highly Cited
1998
In approximately 3.2% of bird species individuals regularly forgo the opportunity to breed independently and instead breed… 
Highly Cited
1995
Highly Cited
1995
This paper investigates a new technique for the solving of multimodal problems using genetic algorithms (GAs). The proposed… 
Highly Cited
1986
Highly Cited
1986
There exist important deductive systems, such as the non-normal modal logics, that are not proper subjects of classical algebraic… 
Highly Cited
1977
Highly Cited
1977
Some modal logics based on logics weaker than the classical logic have been studied by Fitch [4], Prior [7], Bull [1], [2], [3… 
Highly Cited
1968
Highly Cited
1968
A theoretical treatment of particle‐particle interaction is described from which the viscosity‐concentration behavior of…